Stoker construction



Jan. 17, 1928. 1,656,767

M. ALPERN STQKER CONSTRUCTION Filed Ap 4, 1922 i Y J @676 FED f? ga Jan. 17, 1928.

M. ALPERN STOKER couswaucwior;

Filed April 4, 1922 2 Sheets-Sheet 2 Patented Jan. 17, 1928.

UNITED STATES 1,656,767 PATENT OFFICE.

MAXWELL ALBERN. OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO AMERICAN ENGINEERING COMPANY, OF PEIILADELPEIA, PENNSYLVANIA, A CORPORATION OF ZPENNSYLVANIA.

STOKIER CONSTRUOTION..

One object of this invention is to provide a relatively simple, durable and economlcal form of underfeed stolrer characterized by the inclusion of suitably formed plates movable between the retorts and the dumping plates, for assisting in the rearward movement of fuel and ash, without delivering or permitting the delivery of air thereto.

It is further desired to provide a stolrer of the type noted with imperforate reciprocating or rocking extension plates designed to eliminate the use of and necessity for the air openings and avoiding the sitting through said openings of fine fuel and ash which has hitherto interfered with the operation of apparatus of the same general class.

Afurther object of the invention is to provide a stokerof the above type with a novel combination of alternated movable plates and immovable extension grates; the arrangement being such that the grates shall be substantially in the line of the retorts while the imperforate plates in the lines of the tuyeres shall be movable in order to assist the rearward movement of fuel and ash at those points where such movement would otherwise be sluggish or insufiicient.

These objects and other advantageous ends I attain as hereinafter set forth, reference being had to the accompanying drawings, in which,

Fig.1 is a plan of a. portion of an inclined underfeed stoker embodying a simple form of my invention; and

Fig. 2 is a longitudinal vertical section on the line 2-2, Fig. 1.

In the above drawings, 1 represents a portion of the wind box of a Stoker of the inclined underfeed type, supplied by air under pressure from a suitable source 2. Fuel is delivered by suitable means, forming no part of the present invention, to a series of parallel retorts 3 which are alternated with series of tuyeres 4, suppliedwith air from the wind box 1. To the rear of the wind box 1 and adjacent the rear ends of the retorts and series of tuyeres, is a line of plates 5, the front ends of which fit under suitable transversely extending plates 6 and which are outside and to the rear of the wind box 1.

The plates 5 extend from the plates 6 rearwardly to a series of dumping plates 7. The latter extend transversely of the structure between the lower rear edges of the plate and a bridge wall (not shown). The dumpmg plates 7 are pivotally supported on a shaft or spindle 8 and are normally held in their substantial horizontal raised posi- According to my invention, the plates 5 comprise a series of movable dead plates 14 which are positioned in line with the rows of tuyeres t and reciprocated by means of rods 15. Thus, fuel in direct alignment with :the series of tuyeres 4 is positively fed toward the dumping. plates 7 independently of the action of the rams (not shown) in the retorts 8. y

A'pluralityot stationary extension grates 16 are positioned intermediate the movable dead plates 14 in alignment with the retorts 3, as shown in Fig. 1. Air may be supplied to the stationary grates 16 as illustrated in Fig. 2 through openings 17 in a wall 18 of the air box 1,-the amount of air being controlled by a damper 19 having an operating rod 21 extending to the front of the stoker. The stationary grate structures 16 may be provided with air delivery openings 22.

'With the construction as above described, the bodies of fuel in line with the series of tuyeres 4 and therefore requiring for their movement abnormal pressure upon the rams (not shown) are assisted in their rearward movement by the plate sections 14, While those portions of the fuel in line with the retorts 3 which are moved by reason of the direct action of said rams and hence might not be completely burned owing to the relatively rapid movement, are supplied with air through the openings 22 of the station ary grates 16, which insure that such fuel shall be completely consumed.

While I have shown only one embodiment of my invention, for the purpose of describ; ing the same and illustrating its principles of construction and operation, it is apparent that various changes andmodification may be made therein without departing from the spirit of my invention and I desire, therefore, that only such limitations shall be imposed thereon as are indicated in the up pended claims or as are demanded by the PIIQI art. i

I cldi'm:

1 The combination in an inclined undergrates Contiguous to said tuyeres and retorts,

respectively; and means lcrn'ioving said (2:;- tension plates.

2. The combination in aninclined under- 'natecl with said l'etol'ts; dead 'plate sections in the lines ofthe respective tuyiales;Nst.'1- tiolmry gratesin line with the respective re- "torts; means for moving thedeadjplates in the lines el" the respective tilyere's QQHZCjlLITlEkHlS ,f O I supplying eh under pressure to the stawrye f f sr r E3, The combination in anflincli'ned .nn'derfe'd Stoker fof .retort's; 'series of tuyeres Telternated with said retei ts; 'steti'oneryjgrates re p ctively incline with said 'letcrts; end l'ndi ahle "dead plates respectively in line-With said t iyeres.

Thecom'hinetion in an inclined under- "feedfs'tijker df'retorts; series of tuyeres alternated with the retcrts; a HIOVELblBdGEld plate o erati el ussqcieted with each series of tuyeres for feeding rearwardlytheifnelrin ing structures respectively in line with the rtol'ts.

The combination in an inclined underfeed stoker of retorts; series of tuyeres altevnetedwith theretcrts; a lllOVfllJlG dead plate operntively associated wx itlr enelr series of tuyeres For feeding;rezirwardly the fuel in line tlicrewith; niezms for supnlying air 1 grade structures 1'01 cuttingioillairfrem the feed Stdliei ofreterts; llnfes cl tuyeres Ialt'er- :fuel in line witlnaricl tdthereer oi? the retorts to a desired extent.

6. The eemhinzition in nlinulti 'ile retort iun'deife'edeteker of alternated rjetmts and tuyeres'; deed plates in line. wmththetnyeres respectively; grates respectively in line with the retorts; means for nwmng the dead plates; and means lor slilpplyinghir ifncler "pres re to the -grates. i 7. The combination in mistaken of retorts placed sideby sideytuyeree positioned between said retorts; alternated dead plates and open grates extendingeafless the str ker :it the rea'r ef the retoflts, the gretesheing stationary :mdthe dead plates merahle;

means for su 'iplying air under pressureto the tuye'res, dezidlflates and grates; and

dampermeans fdr eontrcllingthesupply cf air to thegrates. line therewith; and stationary fuelsupporb MAXWEEL deepens. 

